PIONEER DJ Serato DDJ-REV5 Instruction Manual page 140

 Playback sound is interrupted when using rekordbox.
• Set the buffer size (latency) properly in [Audio] under [Preferences] on the rekordbox
screen.
 Fader Start doesn't work.
• Set a cue.
 Recording isn't possible when a PC/Mac running rekordbox
isn't connected to the unit.
• If you haven't signed up for a rekordbox subscription plan, you can't use the recording
function when a PC/Mac running rekordbox isn't connected to the unit. Connect this unit or
another Hardware Unlock device, or sign up for a subscription plan to enable recording.
Others
 Indicators blink and something is wrong with the unit.
• If something is wrong with the unit or the unit doesn't turn on, pull out the AC adapter cable
from the DC jack, then connect it after a while. If this doesn't resolve the problem, request
a repair.
Additional information
140